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Finding the Fourth Proportional to 671.84, 999.84 and 669.92

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Solution

The fourth proportional to 671.84, 999.84 and 669.92 is: 996.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.84 : 999.84 = 669.92 : x
  2. Step 2: Convert to fraction form
    671.84/999.84 = 669.92/x
  3. Step 3: Cross multiply
    671.84x = 999.84 × 669.92
  4. Step 4: Simplify right side
    671.84x = 669,812.81
  5. Step 5: Solve for x
    x = 669,812.81/671.84
  6. Step 6: Final answer
    x = 996.98

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.